#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
void nixu(char a[]) {
	int sz = sizeof(a);
	char  tmp;
	tmp = a[0];
	a[0] = a[sz = 1];
	a[sz - 1] = '\0';
	if (sizeof(a) / sizeof(a[0]) - 2 >= 2)
		nixu(a + 1);
	a[sz - 1] = tmp;
}
int main()
{
	char a[]="abcdef";
	int sz = sizeof(a) / sizeof(a[0]) - 1;
	nixu(a);
	printf("%s", a);
}